Interfacial Tm3+ moment-driven anomalous Hall effect in Pt/Tm3Fe5O12 heterostructure

Yu Kuai Liu; Hon Fai Wong; Sheung Mei Ng; Chee Leung Mak; Chi Wah Leung

doi:10.1016/j.jmmm.2020.166454

Interfacial Tm³⁺ moment-driven anomalous Hall effect in Pt/Tm₃Fe₅O₁₂ heterostructure

Yu Kuai Liu, Hon Fai Wong, Sheung Mei Ng, Chee Leung Mak, Chi Wah Leung

Research output: Journal article publication › Journal article › Academic research › peer-review

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Abstract

We performed anomalous Hall effect (AHE) measurements in Pt/Tm₃Fe₅O₁₂ (Pt/TmIG) bilayers grown on (1 1 0) and (1 1 1)-oriented Gd₃Ga₅O₁₂ (GGG) substrates (Pt/110TmIG and Pt/111TmIG). Qualitative differences were observed in the two sets of samples: at low magnetic fields only Pt/111TmIG displays square AHE loop, while Pt/110TmIG exhibits non-hysteretic AHE behavior. Systematic temperature-dependent AHE measurements in Pt/111TmIG showed double switching events of AHE loops below 30 K, which was attributed to the larger moment of Tm³⁺ sublattice at low temperatures and was consistent with earlier theoretical calculations [A. Lehmann-Szweykowska et al., Phys. Rev. B 37, 459 (1988)]. Our results confirmed the strong coupling of Tm³⁺ magnetic moment with the lattice and the crucial role of the interfacial structure, suggesting a way to detect rare earth moment switching in iron garnets by electrical measurements.

Original language	English
Article number	166454
Journal	Journal of Magnetism and Magnetic Materials
Volume	501
DOIs	https://doi.org/10.1016/j.jmmm.2020.166454
Publication status	Published - 1 May 2020

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2020.166454

http://hdl.handle.net/10397/100227

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title = "Interfacial Tm3+ moment-driven anomalous Hall effect in Pt/Tm3Fe5O12 heterostructure",

abstract = "We performed anomalous Hall effect (AHE) measurements in Pt/Tm3Fe5O12 (Pt/TmIG) bilayers grown on (1 1 0) and (1 1 1)-oriented Gd3Ga5O12 (GGG) substrates (Pt/110TmIG and Pt/111TmIG). Qualitative differences were observed in the two sets of samples: at low magnetic fields only Pt/111TmIG displays square AHE loop, while Pt/110TmIG exhibits non-hysteretic AHE behavior. Systematic temperature-dependent AHE measurements in Pt/111TmIG showed double switching events of AHE loops below 30 K, which was attributed to the larger moment of Tm3+ sublattice at low temperatures and was consistent with earlier theoretical calculations [A. Lehmann-Szweykowska et al., Phys. Rev. B 37, 459 (1988)]. Our results confirmed the strong coupling of Tm3+ magnetic moment with the lattice and the crucial role of the interfacial structure, suggesting a way to detect rare earth moment switching in iron garnets by electrical measurements.",

author = "Liu, {Yu Kuai} and Wong, {Hon Fai} and Ng, {Sheung Mei} and Mak, {Chee Leung} and Leung, {Chi Wah}",

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AU - Liu, Yu Kuai

AU - Wong, Hon Fai

AU - Ng, Sheung Mei

AU - Mak, Chee Leung

AU - Leung, Chi Wah

PY - 2020/5/1

Y1 - 2020/5/1

N2 - We performed anomalous Hall effect (AHE) measurements in Pt/Tm3Fe5O12 (Pt/TmIG) bilayers grown on (1 1 0) and (1 1 1)-oriented Gd3Ga5O12 (GGG) substrates (Pt/110TmIG and Pt/111TmIG). Qualitative differences were observed in the two sets of samples: at low magnetic fields only Pt/111TmIG displays square AHE loop, while Pt/110TmIG exhibits non-hysteretic AHE behavior. Systematic temperature-dependent AHE measurements in Pt/111TmIG showed double switching events of AHE loops below 30 K, which was attributed to the larger moment of Tm3+ sublattice at low temperatures and was consistent with earlier theoretical calculations [A. Lehmann-Szweykowska et al., Phys. Rev. B 37, 459 (1988)]. Our results confirmed the strong coupling of Tm3+ magnetic moment with the lattice and the crucial role of the interfacial structure, suggesting a way to detect rare earth moment switching in iron garnets by electrical measurements.

AB - We performed anomalous Hall effect (AHE) measurements in Pt/Tm3Fe5O12 (Pt/TmIG) bilayers grown on (1 1 0) and (1 1 1)-oriented Gd3Ga5O12 (GGG) substrates (Pt/110TmIG and Pt/111TmIG). Qualitative differences were observed in the two sets of samples: at low magnetic fields only Pt/111TmIG displays square AHE loop, while Pt/110TmIG exhibits non-hysteretic AHE behavior. Systematic temperature-dependent AHE measurements in Pt/111TmIG showed double switching events of AHE loops below 30 K, which was attributed to the larger moment of Tm3+ sublattice at low temperatures and was consistent with earlier theoretical calculations [A. Lehmann-Szweykowska et al., Phys. Rev. B 37, 459 (1988)]. Our results confirmed the strong coupling of Tm3+ magnetic moment with the lattice and the crucial role of the interfacial structure, suggesting a way to detect rare earth moment switching in iron garnets by electrical measurements.

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SN - 0304-8853

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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Interfacial Tm³⁺ moment-driven anomalous Hall effect in Pt/Tm₃Fe₅O₁₂ heterostructure

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